Results 101 to 110 of about 5,839 (163)

提高煤岩渗透性的酸化处理室内研究 [PDF]

open access: yes, 2014
李瑞, 王于健, 王坤
core  

金瓷全冠与天然牙切缘抗压强度的比较

open access: yesZhongshan Daxue xuebao. Yixue kexue ban, 2002
【目的】探讨和比较金瓷全冠及天然牙切缘的抗压强度, 预防瓷折裂。【方法】制作15 个前牙金瓷全冠, 挑选15 个离体前牙, 测定其折裂时的强度。【结果】金瓷全冠切缘抗折力为1200 N(122 kg), 抗压强度为600 MPa 。天然牙切缘抗折 力为530 N(54 kg), 抗压强度为265 MPa 。【结论】金瓷全冠切缘的抗压强度大于天然牙切缘的抗压强度。瓷折裂除意外撞 伤外, 大多数是因为设计和制作缺陷造成的。
doaj  

[Medical treatment standards for emergency trauma wounded (2025 edition)]. [PDF]

open access: yesZhongguo Xiu Fu Chong Jian Wai Ke Za Zhi
National Health Commission Of The People's Republic Of China.
europepmc   +1 more source

[Short-term effectiveness of edge-to-edge #-shaped suture for complete radial tear of lateral meniscus body]. [PDF]

open access: yesZhongguo Xiu Fu Chong Jian Wai Ke Za Zhi
Zhong H   +6 more
europepmc   +1 more source

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